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Texas Instruments DS34C86TM/NOPB
- Part No.:
- DS34C86TM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS34C86TM/NOPB.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:451
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Product details
Overview
DS34C86TM/NOPB from Texas Instruments (formerly National Semiconductor) is a quad CMOS differential line receiver compliant with RS-422, RS-423, and Federal Standards 1020/1030 for balanced/unbalanced digital data transmission. It delivers ±200 mV input sensitivity over ±7 V common-mode range, 19 ns typical propagation delay, 60 mV input hysteresis, and TRI-STATE® outputs with 6 mA drive capability-used in industrial serial communication interfaces requiring noise-immune signal reception.
For engineers reviewing the DS34C86TM/NOPB datasheet, DS34C86TM/NOPB pinout, DS34C86TM/NOPB application, or DS34C86TM/NOPB equivalent, key selection criteria include RS-422 receiver compatibility, fail-safe open-input behavior (output high), independent channel enable control, ±7 V common-mode tolerance, and SOIC-16 surface-mount packaging for space-constrained bus receivers.
Technical Context
The DS34C86TM/NOPB implements four independent CMOS differential receivers with separate enable inputs per pair, supporting true bus-oriented architectures. Each channel features internal pull-up/pull-down resistors to prevent floating output oscillation on unused channels and includes hysteresis to reject slow-edge or noisy inputs.
It operates from 4.5 V to 5.5 V supply, supports ±14 V absolute maximum input common-mode and differential voltage, and maintains input high-impedance (≥5 kΩ) even when VCC = 0 V-enabling hot-swap and power sequencing robustness in multi-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V logic rails and tolerant of ±10% regulation variation |
| Input Sensitivity | ±200 mV differential threshold - ensures reliable detection under low-amplitude RS-422 signals and cable loss |
| Common-Mode Range | ±7 V - supports long-distance transmission with ground potential differences across nodes |
| Propagation Delay | 19 ns typical - enables >25 Mbps data rates in point-to-point or multidrop RS-422 links |
| Output Drive | 6 mA source/sink - sufficient to drive LS-TTL loads and terminate stubs without external buffers |
| Hysteresis | 60 mV - suppresses chatter on marginal or slowly transitioning differential inputs |
| Fail-Safe Behavior | Open-input → high output - guarantees defined logic state during cable disconnect or termination fault |
Pinout & Package
DS34C86TM/NOPB is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, NS package code M16A, with 1.27 mm lead pitch and gull-wing surface-mount terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Differential Input A− | Inverting input for Receiver Channels 1–4; accepts balanced RS-422 signals |
| 2, 5, 11, 14 | Differential Input A+ | Non-inverting input for Receiver Channels 1–4; paired with corresponding A− pins |
| 3, 6, 12, 15 | Enable Input | Active-high enable per channel pair (pins 3/6 for Ch1/2; 12/15 for Ch3/4) |
| 7, 8, 9, 16 | Output Y | TRI-STATE® CMOS output per channel; high-impedance when enable = low |
| 16 | VCC | Positive supply (4.5–5.5 V); powers all four receivers and internal bias circuitry |
| 8 | GND | Signal reference ground; shared return for all channels and enable logic |
Key Features
| Feature | Design Value |
|---|---|
| RS-422/RS-423 Compliance | Fully meets EIA-422 electrical requirements including ±200 mV sensitivity and ±7 V common-mode range |
| Independent Channel Enable | Two enable pairs (pins 3/6 and 12/15) allow selective activation of receiver groups without software overhead |
| Fail-Safe Open-Input | Outputs default high when inputs are unconnected or unterminated-prevents undefined bus states |
| Zero-VCC Input Isolation | Inputs present high impedance (<1.5 µA leakage) even with VCC = 0 V-supports hot-plug and partial-power-down modes |
| SOIC-16 Surface Mount | M16A footprint enables automated assembly and compact PCB layout in industrial control modules |
Applications
| Industrial PLC Serial Interface | Factory Automation Data Link |
|---|---|
Use Scenario: RS-422 multidrop communication between PLC CPU and remote I/O modules over 100+ meter twisted-pair runs. IC Role / Device Role / Timing Role: Differential line receiver converting balanced bus signals to single-ended TTL-compatible logic for microcontroller input. Use Value: ±7 V common-mode tolerance rejects ground-loop noise; 60 mV hysteresis prevents false triggering from EMI-induced edge jitter. | Use Scenario: High-noise factory floor where motor drives induce transients on serial cabling between HMIs and controllers. IC Role / Device Role / Timing Role: Noise-immune receiver front-end for isolated RS-422 physical layer in safety-critical motion control networks. Use Value: Fail-safe open-input behavior ensures controller sees logical '1' during cable disconnection-avoids unintended stop commands. |
| Point-of-Sale Terminal Backplane | Test Equipment Digital Bus Monitor |
Use Scenario: Compact retail terminal with multiple peripheral ports (barcode scanner, receipt printer) sharing a single RS-422 bus. IC Role / Device Role / Timing Role: Quad receiver enabling concurrent monitoring of up to four differential data streams on one PCB. Use Value: Independent enable pins allow dynamic channel power gating-reducing idle current by >70% versus always-on receivers. | Use Scenario: Benchtop logic analyzer capturing asynchronous serial traffic from legacy instrumentation using RS-422 physical layer. IC Role / Device Role / Timing Role: Signal conditioning interface translating differential probe outputs to FPGA or microcontroller GPIO inputs. Use Value: 19 ns propagation delay preserves timing integrity for sampling at ≥50 MHz clock domains without skew compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LBC179DR | Single-channel RS-422 receiver; no internal pull-ups; requires external failsafe biasing | Lacks quad integration and independent enable-requires four devices and additional passives for same functionality | Preferred only when board area allows discrete channel scaling and design tolerates added BOM complexity |
| MAX3089CSA+ | Quad RS-422/485 receiver with slew-rate limiting; 5 V supply; ±15 kV ESD protection | Includes integrated ESD protection and driver disable control-suited for harsher EMC environments | Chosen when system-level ESD immunity exceeds 2 kV HBM or when combined transceiver/receiver consolidation is needed |
Compared with SN65LBC179DR and MAX3089CSA+, DS34C86TM/NOPB provides native quad integration with built-in failsafe and enable logic in a single SOIC-16 package-reducing component count and layout effort for deterministic RS-422 receiver subsystems.
Availability
DS34C86TM/NOPB is available at Aetrix Electronics and suitable for industrial automation, factory floor communications, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for DS34C86TM/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments acquired National Semiconductor in 2011 and maintains its legacy analog and interface product lines with full datasheet, simulation model, and technical support continuity.
The DS34C86TM/NOPB belongs to National's classic RS-422/423 interface family, designed specifically for robust, low-power differential data reception in electrically noisy industrial and instrumentation environments.
FAQ
What is the operating temperature range for DS34C86TM/NOPB?
The DS34C86TM/NOPB is specified to operate from −40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation cabinets, outdoor kiosks, and embedded control systems exposed to thermal cycling. All DC and AC electrical characteristics-including propagation delay, input hysteresis, and output drive-are guaranteed across this full range when supplied with 4.5 V to 5.5 V.
Does DS34C86TM/NOPB support RS-485 bus operation?
No, DS34C86TM/NOPB is not RS-485 compliant. It meets RS-422 and RS-423 standards only, with receiver-only functionality and no driver section. RS-485 requires bidirectional half-duplex or full-duplex transceivers with specific driver output voltage swing and unit load definitions-none of which apply to DS34C86TM/NOPB. For RS-485, TI recommends the SN65HVD7x or THVD15xx families.
How does the fail-safe feature work on DS34C86TM/NOPB?
The DS34C86TM/NOPB implements open-input failsafe by internally biasing the differential input stage so that an unterminated or disconnected input pair produces a logic high output. This occurs because the internal circuitry forces the output to VOL < 0.3 V or VOH > 3.8 V depending on differential polarity-and with no signal, the default state is high. This behavior is confirmed in the Truth Table footnote "*Open, not terminated" and prevents undefined states during cable faults or hot-swap events.
Can DS34C86TM/NOPB be used with a 3.3 V supply?
No, DS34C86TM/NOPB requires a minimum 4.5 V supply and is not rated for 3.3 V operation. Its DC specifications-including VOH (≥3.8 V), VOL (≤0.3 V), and input thresholds-are guaranteed only between 4.5 V and 5.5 V. Attempting 3.3 V operation results in undefined output levels, degraded noise margin, and possible failure to meet RS-422 sensitivity. For 3.3 V systems, consider TI's SN65LVDS31 or Analog Devices' ADM2483.
Is DS34C86TM/NOPB pin-compatible with DS3486?
Yes, DS34C86TM/NOPB is pin-compatible with the older DS3486, as explicitly stated in the datasheet: "The DS34C86T is pin compatible with the DS3486." Both share identical SOIC-16 (M16A) and DIP-16 (N16E) footprints, matching pin functions for inputs, outputs, enables, VCC, and GND. However, DS34C86TM/NOPB offers improved propagation delay (19 ns vs. 25 ns typ) and lower quiescent current, making it a direct functional upgrade.
DS34C86TM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Receiver
- Protocol:
- RS422, RS423
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 60 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DS34C86TM/NOPB FAQ
1.How can I place an order for DS34C86TM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for DS34C86TM/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS34C86TM/NOPB reliable?
The price and inventory of DS34C86TM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS34C86TM/NOPB is usually 5 days.
3.What payment methods are accepted for DS34C86TM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS34C86TM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS34C86TM/NOPB?
DS34C86TM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS34C86TM/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS34C86TM/NOPB?
For technical support, including DS34C86TM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS34C86TM/NOPB requirements.
6.How does Aetrix verify that DS34C86TM/NOPB is sourced from the original manufacturer or authorized distributors?
All DS34C86TM/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS34C86TM/NOPB meets industry standards.
7.What is the process for return or replacement of DS34C86TM/NOPB?
All DS34C86TM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with DS34C86TM/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS34C86TM/NOPB part is unused and in its original packaging.
Return procedure for DS34C86TM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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